Method of cutting a worm screw and a worm screw obtained by the

Details Method of cutting a worm screw and a worm screw obtained by the Method of cutting a worm screw and a worm screw obtained by the

1985-01-25

1987-08-04

Godici, Nicholas P.

Turning

Process of turning

B23B 100, B23G 100

Patent

active

046837850

ABSTRACT:
A worm screw has two threaded portions of opposite hand cut on a single shaft, using a lathe. Several passes of the cutting tool are used to form each of these threaded portions, and in order to provide a compact and robust worm screw of this type the two threaded portions are separated by a groove having a depth shallower than that of the threads being cut and having a width at least equal to 15% of the greater axial pitch of the threaded portions.

REFERENCES:
patent: 1000898 (1911-08-01), Cushing
patent: 2469262 (1949-05-01), Eggers
patent: 2593310 (1952-04-01), Johnson
patent: 3147655 (1964-09-01), Honekamp
patent: 3237492 (1966-03-01), Massey
patent: 3731546 (1973-05-01), MacDonald
patent: 3844177 (1974-10-01), Bourassa
How to Run a Lathe 42nd Edition 1942, J. J. & M. W. O'Brien, p. 80.
Lathes vol. II 1963 by P. S. Houghton, p. 2.
Machine Shop Practice vol. 1 Karl Moltrecht, Industrial Press Inc., N.Y., N.Y., pp. 275-281, 289-294.

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